<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="#" method="delete">
    <ul>
        <li><input type="text" name="username"></li>
        <li><input type="checkbox" name="fav" value="1"> linux</li>
        <li><input type="checkbox" name="fav" value="2"> python</li>
        <li><input type="checkbox" name="fav" value="3"> c</li>
        <li><input type="submit" value="提交"></li>
    </ul>
</form>
</body>
</html>